//Copyright 2008 Kristian Gundry And Rune Juhl-Petersen
//This file is part of Plain.

//Plain is free software: you can redistribute it and/or modify
//it under the terms of the GNU Lesser General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//any later version.

//Plain is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Lesser General Public License for more details.

//You should have received a copy of the GNU Lesser General Public License
//along with Plain.  If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections.Generic;
using System.Text;

namespace Plain.Search
{
	/// <summary>
	/// Abstract Criteria
	/// </summary>
	public abstract class Criteria
	{
		/// <summary>
		/// And two criterias together
		/// </summary>
		/// <param name="crit1"></param>
		/// <param name="crit2"></param>
		/// <returns></returns>
		public static Criteria operator &(Criteria crit1, Criteria crit2)
		{
			if (crit1 is CriteriaCollection && ((CriteriaCollection)crit1).Type == CriteriaCollectionType.AllOf)
			{
				((CriteriaCollection)crit1).Criterias.Add(crit2);
				return crit1;
			}
			else
			{
				CriteriaCollection col = new CriteriaCollection();
				col.Type = CriteriaCollectionType.AllOf;
				col.Criterias.Add(crit1);
				col.Criterias.Add(crit2);
				return col;

			}

		}
		/// <summary>
		/// Or two criterias together
		/// </summary>
		/// <param name="crit1"></param>
		/// <param name="crit2"></param>
		/// <returns></returns>
		public static Criteria operator |(Criteria crit1, Criteria crit2)
		{
			if (crit1 is CriteriaCollection && ((CriteriaCollection)crit1).Type == CriteriaCollectionType.OneOf)
			{
				((CriteriaCollection)crit1).Criterias.Add(crit2);
				return crit1;
			}
			else
			{
				CriteriaCollection col = new CriteriaCollection();
				col.Type = CriteriaCollectionType.OneOf;
				col.Criterias.Add(crit1);
				col.Criterias.Add(crit2);

				return col;

			}

		}
        //public static class CriteriaExtensions { 
        //    public static Criteria doStuff(this Criteria c1, Criteria c2){
        //           return null;
        //    }
        //    //public static Criteria operator | (this Criteria c1,Criteria c2){}
          
        //}
	}
}
